فهرس المقالات EOQ · Screening cost · Imperfect quality · Cloudy fuzzy number · New defuzzification method · Optimization حرية الوصول المقاله صفحة الملخص نص كامل 1 - A cloudy fuzzy economic order quantity model for imperfect-quality items with allowable proportionate discounts Sujit Kumar De Gour Chandra Mahata